We always did back to sleep. To me, it wasn't worth the risk, and I would never forgive myself if something happened. I know everyone doesn't feel the same, and that's ok. Part of the problem is tummy sleeping keeps their arms and legs 'contained' so to speak, whereas on their back they flail. Both my DD's did much much better with a swaddle blanket, it gives them that 'cuddled' feeling they have in the womb. That being said, both my girls just had trouble sleeping anywhere but mommies arms until closer to 6 weeks. Good luck!